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    Impact of Watershed Geomorphic Characteristics on the Energy and Water Budgets

    Source: Journal of Hydrometeorology:;2006:;Volume( 007 ):;issue: 003::page 389
    Author:
    Bertoldi, Giacomo
    ,
    Rigon, Riccardo
    ,
    Over, Thomas M.
    DOI: 10.1175/JHM500.1
    Publisher: American Meteorological Society
    Abstract: The GEOtop model makes it possible to analyze the short- and long-term effects of geomorphic variation on the partitioning of the lateral surface and subsurface water and surface energy fluxes. The topography of the Little Washita basin (Oklahoma) and of the Serraia basin (Trentino, Italy) have been used as base topographies from which virtual topographies with altered slopes and elevations have been created with corresponding modifications of the soil thickness and the extension of the channel network, according to applicable geomorphological theories, in order to quantify the contribution of these topographic features to the spatial and temporal variability of energy and water fluxes. Simulation results show that both a more extended channel network and more accentuated slopes cause an increase in the discharge balanced by a diminution of the evapotranspiration. The diminution of the latent heat flux is balanced by the increase in the sensible heat flux. Net radiation shows a minor sensitivity to topography. Evaporative fraction, on the contrary, is shown to be strongly dependent on geomorphic characteristics. The results confirm the importance of including an adequate treatment of topography in large-scale land surface models.
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      Impact of Watershed Geomorphic Characteristics on the Energy and Water Budgets

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4224517
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    • Journal of Hydrometeorology

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    contributor authorBertoldi, Giacomo
    contributor authorRigon, Riccardo
    contributor authorOver, Thomas M.
    date accessioned2017-06-09T17:13:56Z
    date available2017-06-09T17:13:56Z
    date copyright2006/06/01
    date issued2006
    identifier issn1525-755X
    identifier otherams-81506.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4224517
    description abstractThe GEOtop model makes it possible to analyze the short- and long-term effects of geomorphic variation on the partitioning of the lateral surface and subsurface water and surface energy fluxes. The topography of the Little Washita basin (Oklahoma) and of the Serraia basin (Trentino, Italy) have been used as base topographies from which virtual topographies with altered slopes and elevations have been created with corresponding modifications of the soil thickness and the extension of the channel network, according to applicable geomorphological theories, in order to quantify the contribution of these topographic features to the spatial and temporal variability of energy and water fluxes. Simulation results show that both a more extended channel network and more accentuated slopes cause an increase in the discharge balanced by a diminution of the evapotranspiration. The diminution of the latent heat flux is balanced by the increase in the sensible heat flux. Net radiation shows a minor sensitivity to topography. Evaporative fraction, on the contrary, is shown to be strongly dependent on geomorphic characteristics. The results confirm the importance of including an adequate treatment of topography in large-scale land surface models.
    publisherAmerican Meteorological Society
    titleImpact of Watershed Geomorphic Characteristics on the Energy and Water Budgets
    typeJournal Paper
    journal volume7
    journal issue3
    journal titleJournal of Hydrometeorology
    identifier doi10.1175/JHM500.1
    journal fristpage389
    journal lastpage403
    treeJournal of Hydrometeorology:;2006:;Volume( 007 ):;issue: 003
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
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